virajkulkarni14

#!/bin/bash

sudo service mongodb stop
sudo rm /var/lib/mongodb/mongod.lock
sudo chown -R mongodb:mongodb /var/lib/mongodb/
sudo service mongodb start

virajkulkarni14

sudo rm /var/lib/mongodb/mongod.lock
sudo chown -R mongodb:mongodb /var/lib/mongodb/
sudo service mongodb start

virajkulkarni14

include MongodbLogger:: Base

virajkulkarni14

##Realtime Analytics

http://www.mongodb.com/presentations/real-time-analytics-mongodb-webinar

http://blog.mongohq.com/first-steps-of-an-analytics-platform-with-mongodb/

http://rubayeet.wordpress.com/2013/12/29/web-analytics-using-mongodb-aggregation-framework/

http://docs.mongodb.org/ecosystem/use-cases/pre-aggregated-reports/

virajkulkarni14

NoSQL

• Escalabilidade Blog

  • Os maiores mitos sobre NoSQL

    • Entenda como o Google processa Grafos

    • Usos práticos do Hadoop

virajkulkarni14

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

virajkulkarni14

This removes, forcefully, everything in the old npm folders.
sudo rm -rf /usr/local/lib/node_modules
sudo rm -rf ~/.npm

This removes node and puts it back without npm
brew uninstall node

For advanced users, the rest of these can be run via copy and paste into terminal.

brew install node --without-npm

virajkulkarni14

WITH RECURSIVE
    x(i) AS ( VALUES (0)
              UNION ALL SELECT i + 1
                        FROM x
                        WHERE i < 101),
    Z(Ix, Iy, Cx, Cy, X, Y, I) AS (
    SELECT
      Ix,
      Iy,
      X :: FLOAT,

virajkulkarni14

import { Component } from "React";

export var Enhance = ComposedComponent => class extends Component {
  constructor() {
    this.state = { data: null };
  }
  componentDidMount() {
    this.setState({ data: 'Hello' });
  }
  render() {

virajkulkarni14

"use strict";

// Uses jQuery and Q.

var API_KEY = "whatever";

function getFlickrResponseAsync(method, responseProperty, params) {
    var deferred = Q.defer();

    $.ajax("http://www.flickr.com/services/rest/", {